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<head>
  <meta charset="UTF-8">
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  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
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<body>
  
</body>
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<script>
// 双层循环

/* 
  `1*1 -> 1`
  `1*2 -> 2`
  `1*3 -> 3`
  ...
  `1*9 -> 9`

  `2*1 -> 2`
  `2*2 -> 4`
  ...
  `2*9 -> 18`
  ...
  `9*9 -> 81`
*/

for(var x = 1; x < 10; x++) {
  for (var y = 1; y < 10; y++) {
    console.log(`${x}*${y} -> ${x*y}`);
  }
}






</script>